1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
14 #include <sys/queue.h>
15 #include <sys/types.h>
17 #include <sys/socket.h>
18 #include <sys/select.h>
20 #include <rte_malloc.h>
21 #include <rte_memory.h>
22 #include <rte_mempool.h>
24 #include <rte_atomic.h>
25 #include <rte_spinlock.h>
27 #include <libvirt/libvirt.h>
29 #include "channel_manager.h"
30 #include "channel_commands.h"
31 #include "channel_monitor.h"
32 #include "power_manager.h"
35 #define RTE_LOGTYPE_CHANNEL_MANAGER RTE_LOGTYPE_USER1
37 /* Global pointer to libvirt connection */
38 static virConnectPtr global_vir_conn_ptr;
40 static unsigned char *global_cpumaps;
41 static virVcpuInfo *global_vircpuinfo;
42 static size_t global_maplen;
44 static unsigned int global_n_host_cpus;
45 static bool global_hypervisor_available;
48 * Represents a single Virtual Machine
50 struct virtual_machine_info {
51 char name[CHANNEL_MGR_MAX_NAME_LEN];
52 rte_atomic64_t pcpu_mask[CHANNEL_CMDS_MAX_CPUS];
53 struct channel_info *channels[CHANNEL_CMDS_MAX_VM_CHANNELS];
54 char channel_mask[POWER_MGR_MAX_CPUS];
56 enum vm_status status;
57 virDomainPtr domainPtr;
59 rte_spinlock_t config_spinlock;
60 LIST_ENTRY(virtual_machine_info) vms_info;
63 LIST_HEAD(, virtual_machine_info) vm_list_head;
65 static struct virtual_machine_info *
66 find_domain_by_name(const char *name)
68 struct virtual_machine_info *info;
69 LIST_FOREACH(info, &vm_list_head, vms_info) {
70 if (!strncmp(info->name, name, CHANNEL_MGR_MAX_NAME_LEN-1))
77 update_pcpus_mask(struct virtual_machine_info *vm_info)
79 virVcpuInfoPtr cpuinfo;
84 memset(global_cpumaps, 0, CHANNEL_CMDS_MAX_CPUS*global_maplen);
86 if (!virDomainIsActive(vm_info->domainPtr)) {
87 n_vcpus = virDomainGetVcpuPinInfo(vm_info->domainPtr,
88 vm_info->info.nrVirtCpu, global_cpumaps, global_maplen,
89 VIR_DOMAIN_AFFECT_CONFIG);
91 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
92 "in-active VM '%s'\n", vm_info->name);
98 memset(global_vircpuinfo, 0, sizeof(*global_vircpuinfo)*
99 CHANNEL_CMDS_MAX_CPUS);
101 cpuinfo = global_vircpuinfo;
103 n_vcpus = virDomainGetVcpus(vm_info->domainPtr, cpuinfo,
104 CHANNEL_CMDS_MAX_CPUS, global_cpumaps, global_maplen);
106 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting vCPU info for "
107 "active VM '%s'\n", vm_info->name);
111 if (n_vcpus >= CHANNEL_CMDS_MAX_CPUS) {
112 RTE_LOG(ERR, CHANNEL_MANAGER, "Number of vCPUS(%u) is out of range "
113 "0...%d\n", n_vcpus, CHANNEL_CMDS_MAX_CPUS-1);
116 if (n_vcpus != vm_info->info.nrVirtCpu) {
117 RTE_LOG(INFO, CHANNEL_MANAGER, "Updating the number of vCPUs for VM '%s"
118 " from %d -> %d\n", vm_info->name, vm_info->info.nrVirtCpu,
120 vm_info->info.nrVirtCpu = n_vcpus;
122 for (i = 0; i < vm_info->info.nrVirtCpu; i++) {
124 for (j = 0; j < global_n_host_cpus; j++) {
125 if (VIR_CPU_USABLE(global_cpumaps, global_maplen, i, j) > 0) {
129 rte_atomic64_set(&vm_info->pcpu_mask[i], mask);
135 set_pcpus_mask(char *vm_name, unsigned int vcpu, char *core_mask)
138 int flags = VIR_DOMAIN_AFFECT_LIVE|VIR_DOMAIN_AFFECT_CONFIG;
139 struct virtual_machine_info *vm_info;
140 char mask[POWER_MGR_MAX_CPUS];
142 memcpy(mask, core_mask, POWER_MGR_MAX_CPUS);
144 if (vcpu >= CHANNEL_CMDS_MAX_CPUS) {
145 RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds max allowable(%d)\n",
146 vcpu, CHANNEL_CMDS_MAX_CPUS-1);
150 vm_info = find_domain_by_name(vm_name);
151 if (vm_info == NULL) {
152 RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
156 if (!virDomainIsActive(vm_info->domainPtr)) {
157 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
158 " for VM '%s', VM is not active\n",
159 vcpu, vm_info->name);
163 if (vcpu >= vm_info->info.nrVirtCpu) {
164 RTE_LOG(ERR, CHANNEL_MANAGER, "vCPU(%u) exceeds the assigned number of "
165 "vCPUs(%u)\n", vcpu, vm_info->info.nrVirtCpu);
168 memset(global_cpumaps, 0 , CHANNEL_CMDS_MAX_CPUS * global_maplen);
169 for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
172 VIR_USE_CPU(global_cpumaps, i);
173 if (i >= global_n_host_cpus) {
174 RTE_LOG(ERR, CHANNEL_MANAGER, "CPU(%u) exceeds the available "
175 "number of CPUs(%u)\n",
176 i, global_n_host_cpus);
180 if (virDomainPinVcpuFlags(vm_info->domainPtr, vcpu, global_cpumaps,
181 global_maplen, flags) < 0) {
182 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to set vCPU(%u) to pCPU "
183 " for VM '%s'\n", vcpu,
187 rte_spinlock_lock(&(vm_info->config_spinlock));
188 memcpy(&vm_info->pcpu_mask[vcpu], mask, POWER_MGR_MAX_CPUS);
189 rte_spinlock_unlock(&(vm_info->config_spinlock));
195 set_pcpu(char *vm_name, unsigned vcpu, unsigned core_num)
197 char mask[POWER_MGR_MAX_CPUS];
199 memset(mask, 0, POWER_MGR_MAX_CPUS);
203 return set_pcpus_mask(vm_name, vcpu, mask);
207 get_pcpus_mask(struct channel_info *chan_info, unsigned vcpu)
209 struct virtual_machine_info *vm_info =
210 (struct virtual_machine_info *)chan_info->priv_info;
212 if (global_hypervisor_available && (vm_info != NULL))
213 return rte_atomic64_read(&vm_info->pcpu_mask[vcpu]);
219 channel_exists(struct virtual_machine_info *vm_info, unsigned channel_num)
221 rte_spinlock_lock(&(vm_info->config_spinlock));
222 if (vm_info->channel_mask[channel_num] == 1) {
223 rte_spinlock_unlock(&(vm_info->config_spinlock));
226 rte_spinlock_unlock(&(vm_info->config_spinlock));
233 open_non_blocking_channel(struct channel_info *info)
236 struct sockaddr_un sock_addr;
240 info->fd = socket(AF_UNIX, SOCK_STREAM, 0);
241 if (info->fd == -1) {
242 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) creating socket for '%s'\n",
247 sock_addr.sun_family = AF_UNIX;
248 memcpy(&sock_addr.sun_path, info->channel_path,
249 strlen(info->channel_path)+1);
251 /* Get current flags */
252 flags = fcntl(info->fd, F_GETFL, 0);
254 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
255 "'%s'\n", strerror(errno), info->channel_path);
258 /* Set to Non Blocking */
260 if (fcntl(info->fd, F_SETFL, flags) < 0) {
261 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) setting non-blocking "
262 "socket for '%s'\n", strerror(errno), info->channel_path);
265 ret = connect(info->fd, (struct sockaddr *)&sock_addr,
268 /* ECONNREFUSED error is given when VM is not active */
269 if (errno == ECONNREFUSED) {
270 RTE_LOG(WARNING, CHANNEL_MANAGER, "VM is not active or has not "
271 "activated its endpoint to channel %s\n",
275 /* Wait for tv_sec if in progress */
276 else if (errno == EINPROGRESS) {
279 FD_ZERO(&soc_fd_set);
280 FD_SET(info->fd, &soc_fd_set);
281 if (select(info->fd+1, NULL, &soc_fd_set, NULL, &tv) > 0) {
282 RTE_LOG(WARNING, CHANNEL_MANAGER, "Timeout or error on channel "
283 "'%s'\n", info->channel_path);
287 /* Any other error */
288 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) connecting socket"
289 " for '%s'\n", strerror(errno), info->channel_path);
297 open_host_channel(struct channel_info *info)
301 info->fd = open(info->channel_path, O_RDWR | O_RSYNC);
302 if (info->fd == -1) {
303 RTE_LOG(ERR, CHANNEL_MANAGER, "Error(%s) opening fifo for '%s'\n",
309 /* Get current flags */
310 flags = fcntl(info->fd, F_GETFL, 0);
312 RTE_LOG(WARNING, CHANNEL_MANAGER, "Error(%s) fcntl get flags socket for"
313 "'%s'\n", strerror(errno), info->channel_path);
316 /* Set to Non Blocking */
318 if (fcntl(info->fd, F_SETFL, flags) < 0) {
319 RTE_LOG(WARNING, CHANNEL_MANAGER,
320 "Error(%s) setting non-blocking "
322 strerror(errno), info->channel_path);
329 setup_channel_info(struct virtual_machine_info **vm_info_dptr,
330 struct channel_info **chan_info_dptr, unsigned channel_num)
332 struct channel_info *chan_info = *chan_info_dptr;
333 struct virtual_machine_info *vm_info = *vm_info_dptr;
335 chan_info->channel_num = channel_num;
336 chan_info->priv_info = (void *)vm_info;
337 chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
338 chan_info->type = CHANNEL_TYPE_BINARY;
339 if (open_non_blocking_channel(chan_info) < 0) {
340 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open channel: "
341 "'%s' for VM '%s'\n",
342 chan_info->channel_path, vm_info->name);
345 if (add_channel_to_monitor(&chan_info) < 0) {
346 RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
347 "'%s' to epoll ctl for VM '%s'\n",
348 chan_info->channel_path, vm_info->name);
352 rte_spinlock_lock(&(vm_info->config_spinlock));
353 vm_info->num_channels++;
354 vm_info->channel_mask[channel_num] = 1;
355 vm_info->channels[channel_num] = chan_info;
356 chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
357 rte_spinlock_unlock(&(vm_info->config_spinlock));
362 fifo_path(char *dst, unsigned int len)
364 snprintf(dst, len, "%sfifo", CHANNEL_MGR_SOCKET_PATH);
368 setup_host_channel_info(struct channel_info **chan_info_dptr,
369 unsigned int channel_num)
371 struct channel_info *chan_info = *chan_info_dptr;
373 chan_info->channel_num = channel_num;
374 chan_info->priv_info = (void *)NULL;
375 chan_info->status = CHANNEL_MGR_CHANNEL_DISCONNECTED;
376 chan_info->type = CHANNEL_TYPE_JSON;
378 fifo_path(chan_info->channel_path, sizeof(chan_info->channel_path));
380 if (open_host_channel(chan_info) < 0) {
381 RTE_LOG(ERR, CHANNEL_MANAGER, "Could not open host channel: "
383 chan_info->channel_path);
386 if (add_channel_to_monitor(&chan_info) < 0) {
387 RTE_LOG(ERR, CHANNEL_MANAGER, "Could add channel: "
388 "'%s' to epoll ctl\n",
389 chan_info->channel_path);
393 chan_info->status = CHANNEL_MGR_CHANNEL_CONNECTED;
398 add_all_channels(const char *vm_name)
402 struct virtual_machine_info *vm_info;
403 struct channel_info *chan_info;
404 char *token, *remaining, *tail_ptr;
405 char socket_name[PATH_MAX];
406 unsigned channel_num;
407 int num_channels_enabled = 0;
409 /* verify VM exists */
410 vm_info = find_domain_by_name(vm_name);
411 if (vm_info == NULL) {
412 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' not found"
413 " during channel discovery\n", vm_name);
416 if (!virDomainIsActive(vm_info->domainPtr)) {
417 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
418 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
421 d = opendir(CHANNEL_MGR_SOCKET_PATH);
423 RTE_LOG(ERR, CHANNEL_MANAGER, "Error opening directory '%s': %s\n",
424 CHANNEL_MGR_SOCKET_PATH, strerror(errno));
427 while ((dir = readdir(d)) != NULL) {
428 if (!strncmp(dir->d_name, ".", 1) ||
429 !strncmp(dir->d_name, "..", 2))
432 snprintf(socket_name, sizeof(socket_name), "%s", dir->d_name);
433 remaining = socket_name;
434 /* Extract vm_name from "<vm_name>.<channel_num>" */
435 token = strsep(&remaining, ".");
436 if (remaining == NULL)
438 if (strncmp(vm_name, token, CHANNEL_MGR_MAX_NAME_LEN))
441 /* remaining should contain only <channel_num> */
443 channel_num = (unsigned)strtol(remaining, &tail_ptr, 0);
444 if ((errno != 0) || (remaining[0] == '\0') ||
445 tail_ptr == NULL || (*tail_ptr != '\0')) {
446 RTE_LOG(WARNING, CHANNEL_MANAGER, "Malformed channel name"
447 "'%s' found it should be in the form of "
448 "'<guest_name>.<channel_num>(decimal)'\n",
452 if (channel_num >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
453 RTE_LOG(WARNING, CHANNEL_MANAGER, "Channel number(%u) is "
454 "greater than max allowable: %d, skipping '%s%s'\n",
455 channel_num, CHANNEL_CMDS_MAX_VM_CHANNELS-1,
456 CHANNEL_MGR_SOCKET_PATH, dir->d_name);
459 /* if channel has not been added previously */
460 if (channel_exists(vm_info, channel_num))
463 chan_info = rte_malloc(NULL, sizeof(*chan_info),
464 RTE_CACHE_LINE_SIZE);
465 if (chan_info == NULL) {
466 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
467 "channel '%s%s'\n", CHANNEL_MGR_SOCKET_PATH, dir->d_name);
471 snprintf(chan_info->channel_path,
472 sizeof(chan_info->channel_path), "%s%s",
473 CHANNEL_MGR_SOCKET_PATH, dir->d_name);
475 if (setup_channel_info(&vm_info, &chan_info, channel_num) < 0) {
480 num_channels_enabled++;
483 return num_channels_enabled;
487 add_channels(const char *vm_name, unsigned *channel_list,
488 unsigned len_channel_list)
490 struct virtual_machine_info *vm_info;
491 struct channel_info *chan_info;
492 char socket_path[PATH_MAX];
494 int num_channels_enabled = 0;
496 vm_info = find_domain_by_name(vm_name);
497 if (vm_info == NULL) {
498 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
499 "not found\n", vm_name);
503 if (!virDomainIsActive(vm_info->domainPtr)) {
504 RTE_LOG(ERR, CHANNEL_MANAGER, "VM: '%s' is not active\n", vm_name);
505 vm_info->status = CHANNEL_MGR_VM_INACTIVE;
509 for (i = 0; i < len_channel_list; i++) {
511 if (channel_list[i] >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
512 RTE_LOG(INFO, CHANNEL_MANAGER, "Channel(%u) is out of range "
513 "0...%d\n", channel_list[i],
514 CHANNEL_CMDS_MAX_VM_CHANNELS-1);
517 if (channel_exists(vm_info, channel_list[i])) {
518 RTE_LOG(INFO, CHANNEL_MANAGER, "Channel already exists, skipping "
519 "'%s.%u'\n", vm_name, i);
523 snprintf(socket_path, sizeof(socket_path), "%s%s.%u",
524 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
526 if (access(socket_path, F_OK) < 0) {
527 RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
528 "%s\n", socket_path, strerror(errno));
531 chan_info = rte_malloc(NULL, sizeof(*chan_info),
532 RTE_CACHE_LINE_SIZE);
533 if (chan_info == NULL) {
534 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
535 "channel '%s'\n", socket_path);
538 snprintf(chan_info->channel_path,
539 sizeof(chan_info->channel_path), "%s%s.%u",
540 CHANNEL_MGR_SOCKET_PATH, vm_name, channel_list[i]);
541 if (setup_channel_info(&vm_info, &chan_info, channel_list[i]) < 0) {
545 num_channels_enabled++;
548 return num_channels_enabled;
552 add_host_channel(void)
554 struct channel_info *chan_info;
555 char socket_path[PATH_MAX];
556 int num_channels_enabled = 0;
559 fifo_path(socket_path, sizeof(socket_path));
561 ret = mkfifo(socket_path, 0660);
562 if ((errno != EEXIST) && (ret < 0)) {
563 RTE_LOG(ERR, CHANNEL_MANAGER, "Cannot create fifo '%s' error: "
564 "%s\n", socket_path, strerror(errno));
568 if (access(socket_path, F_OK) < 0) {
569 RTE_LOG(ERR, CHANNEL_MANAGER, "Channel path '%s' error: "
570 "%s\n", socket_path, strerror(errno));
573 chan_info = rte_malloc(NULL, sizeof(*chan_info), 0);
574 if (chan_info == NULL) {
575 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for "
576 "channel '%s'\n", socket_path);
579 snprintf(chan_info->channel_path,
580 sizeof(chan_info->channel_path), "%s", socket_path);
581 if (setup_host_channel_info(&chan_info, 0) < 0) {
585 num_channels_enabled++;
587 return num_channels_enabled;
591 remove_channel(struct channel_info **chan_info_dptr)
593 struct virtual_machine_info *vm_info;
594 struct channel_info *chan_info = *chan_info_dptr;
596 close(chan_info->fd);
598 vm_info = (struct virtual_machine_info *)chan_info->priv_info;
600 rte_spinlock_lock(&(vm_info->config_spinlock));
601 vm_info->channel_mask[chan_info->channel_num] = 0;
602 vm_info->num_channels--;
603 rte_spinlock_unlock(&(vm_info->config_spinlock));
610 set_channel_status_all(const char *vm_name, enum channel_status status)
612 struct virtual_machine_info *vm_info;
614 char mask[POWER_MGR_MAX_CPUS];
615 int num_channels_changed = 0;
617 if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
618 status == CHANNEL_MGR_CHANNEL_DISABLED)) {
619 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
620 "disabled: Unable to change status for VM '%s'\n", vm_name);
622 vm_info = find_domain_by_name(vm_name);
623 if (vm_info == NULL) {
624 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to disable channels: VM '%s' "
625 "not found\n", vm_name);
629 rte_spinlock_lock(&(vm_info->config_spinlock));
630 memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
631 for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
634 vm_info->channels[i]->status = status;
635 num_channels_changed++;
637 rte_spinlock_unlock(&(vm_info->config_spinlock));
638 return num_channels_changed;
643 set_channel_status(const char *vm_name, unsigned *channel_list,
644 unsigned len_channel_list, enum channel_status status)
646 struct virtual_machine_info *vm_info;
648 int num_channels_changed = 0;
650 if (!(status == CHANNEL_MGR_CHANNEL_CONNECTED ||
651 status == CHANNEL_MGR_CHANNEL_DISABLED)) {
652 RTE_LOG(ERR, CHANNEL_MANAGER, "Channels can only be enabled or "
653 "disabled: Unable to change status for VM '%s'\n", vm_name);
655 vm_info = find_domain_by_name(vm_name);
656 if (vm_info == NULL) {
657 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add channels: VM '%s' "
658 "not found\n", vm_name);
661 for (i = 0; i < len_channel_list; i++) {
662 if (channel_exists(vm_info, channel_list[i])) {
663 rte_spinlock_lock(&(vm_info->config_spinlock));
664 vm_info->channels[channel_list[i]]->status = status;
665 rte_spinlock_unlock(&(vm_info->config_spinlock));
666 num_channels_changed++;
669 return num_channels_changed;
673 get_all_vm(int *num_vm, int *num_vcpu)
676 virNodeInfo node_info;
677 virDomainPtr *domptr;
678 int i, ii, numVcpus[MAX_VCPUS], n_vcpus;
681 unsigned int domain_flags = VIR_CONNECT_LIST_DOMAINS_RUNNING |
682 VIR_CONNECT_LIST_DOMAINS_PERSISTENT;
683 unsigned int domain_flag = VIR_DOMAIN_VCPU_CONFIG;
685 if (!global_hypervisor_available)
688 memset(global_cpumaps, 0, CHANNEL_CMDS_MAX_CPUS*global_maplen);
689 if (virNodeGetInfo(global_vir_conn_ptr, &node_info)) {
690 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
694 /* Returns number of pcpus */
695 global_n_host_cpus = (unsigned int)node_info.cpus;
697 /* Returns number of active domains */
698 *num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr,
701 RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n");
705 for (i = 0; i < *num_vm; i++) {
707 /* Get Domain Names */
708 vm_name = virDomainGetName(domptr[i]);
709 lvm_info[i].vm_name = vm_name;
711 /* Get Number of Vcpus */
712 numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag);
714 /* Get Number of VCpus & VcpuPinInfo */
715 n_vcpus = virDomainGetVcpuPinInfo(domptr[i],
716 numVcpus[i], global_cpumaps,
717 global_maplen, domain_flag);
719 if ((int)n_vcpus > 0) {
721 lvm_info[i].num_cpus = n_vcpus;
724 /* Save pcpu in use by libvirt VMs */
725 for (ii = 0; ii < n_vcpus; ii++) {
726 for (jj = 0; jj < global_n_host_cpus; jj++) {
727 if (VIR_CPU_USABLE(global_cpumaps,
728 global_maplen, ii, jj) > 0) {
729 lvm_info[i].pcpus[ii] = jj;
737 get_info_vm(const char *vm_name, struct vm_info *info)
739 struct virtual_machine_info *vm_info;
740 unsigned i, channel_num = 0;
741 char mask[POWER_MGR_MAX_CPUS];
743 vm_info = find_domain_by_name(vm_name);
744 if (vm_info == NULL) {
745 RTE_LOG(ERR, CHANNEL_MANAGER, "VM '%s' not found\n", vm_name);
748 info->status = CHANNEL_MGR_VM_ACTIVE;
749 if (!virDomainIsActive(vm_info->domainPtr))
750 info->status = CHANNEL_MGR_VM_INACTIVE;
752 rte_spinlock_lock(&(vm_info->config_spinlock));
754 memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
755 for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
758 info->channels[channel_num].channel_num = i;
759 memcpy(info->channels[channel_num].channel_path,
760 vm_info->channels[i]->channel_path,
762 info->channels[channel_num].status =
763 vm_info->channels[i]->status;
764 info->channels[channel_num].fd =
765 vm_info->channels[i]->fd;
769 info->num_channels = channel_num;
770 info->num_vcpus = vm_info->info.nrVirtCpu;
771 rte_spinlock_unlock(&(vm_info->config_spinlock));
773 memcpy(info->name, vm_info->name, sizeof(vm_info->name));
774 for (i = 0; i < info->num_vcpus; i++) {
775 info->pcpu_mask[i] = rte_atomic64_read(&vm_info->pcpu_mask[i]);
781 add_vm(const char *vm_name)
783 struct virtual_machine_info *new_domain;
784 virDomainPtr dom_ptr;
787 if (find_domain_by_name(vm_name) != NULL) {
788 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to add VM: VM '%s' "
789 "already exists\n", vm_name);
793 if (global_vir_conn_ptr == NULL) {
794 RTE_LOG(ERR, CHANNEL_MANAGER, "No connection to hypervisor exists\n");
797 dom_ptr = virDomainLookupByName(global_vir_conn_ptr, vm_name);
798 if (dom_ptr == NULL) {
799 RTE_LOG(ERR, CHANNEL_MANAGER, "Error on VM lookup with libvirt: "
800 "VM '%s' not found\n", vm_name);
804 new_domain = rte_malloc("virtual_machine_info", sizeof(*new_domain),
805 RTE_CACHE_LINE_SIZE);
806 if (new_domain == NULL) {
807 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to allocate memory for VM "
811 new_domain->domainPtr = dom_ptr;
812 if (virDomainGetInfo(new_domain->domainPtr, &new_domain->info) != 0) {
813 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to get libvirt VM info\n");
814 rte_free(new_domain);
817 if (new_domain->info.nrVirtCpu > CHANNEL_CMDS_MAX_CPUS) {
818 RTE_LOG(ERR, CHANNEL_MANAGER, "Error the number of virtual CPUs(%u) is "
819 "greater than allowable(%d)\n", new_domain->info.nrVirtCpu,
820 CHANNEL_CMDS_MAX_CPUS);
821 rte_free(new_domain);
825 for (i = 0; i < CHANNEL_CMDS_MAX_CPUS; i++) {
826 rte_atomic64_init(&new_domain->pcpu_mask[i]);
828 if (update_pcpus_mask(new_domain) < 0) {
829 RTE_LOG(ERR, CHANNEL_MANAGER, "Error getting physical CPU pinning\n");
830 rte_free(new_domain);
833 strncpy(new_domain->name, vm_name, sizeof(new_domain->name));
834 new_domain->name[sizeof(new_domain->name) - 1] = '\0';
835 memset(new_domain->channel_mask, 0, POWER_MGR_MAX_CPUS);
836 new_domain->num_channels = 0;
838 if (!virDomainIsActive(dom_ptr))
839 new_domain->status = CHANNEL_MGR_VM_INACTIVE;
841 new_domain->status = CHANNEL_MGR_VM_ACTIVE;
843 rte_spinlock_init(&(new_domain->config_spinlock));
844 LIST_INSERT_HEAD(&vm_list_head, new_domain, vms_info);
849 remove_vm(const char *vm_name)
851 struct virtual_machine_info *vm_info = find_domain_by_name(vm_name);
853 if (vm_info == NULL) {
854 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM: VM '%s' "
855 "not found\n", vm_name);
858 rte_spinlock_lock(&vm_info->config_spinlock);
859 if (vm_info->num_channels != 0) {
860 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to remove VM '%s', there are "
861 "%"PRId8" channels still active\n",
862 vm_name, vm_info->num_channels);
863 rte_spinlock_unlock(&vm_info->config_spinlock);
866 LIST_REMOVE(vm_info, vms_info);
867 rte_spinlock_unlock(&vm_info->config_spinlock);
873 disconnect_hypervisor(void)
875 if (global_vir_conn_ptr != NULL) {
876 virConnectClose(global_vir_conn_ptr);
877 global_vir_conn_ptr = NULL;
882 connect_hypervisor(const char *path)
884 if (global_vir_conn_ptr != NULL) {
885 RTE_LOG(ERR, CHANNEL_MANAGER, "Error connecting to %s, connection "
886 "already established\n", path);
889 global_vir_conn_ptr = virConnectOpen(path);
890 if (global_vir_conn_ptr == NULL) {
891 RTE_LOG(ERR, CHANNEL_MANAGER, "Error failed to open connection to "
892 "Hypervisor '%s'\n", path);
898 channel_manager_init(const char *path __rte_unused)
902 LIST_INIT(&vm_list_head);
903 if (connect_hypervisor(path) < 0) {
904 global_n_host_cpus = 64;
905 global_hypervisor_available = 0;
906 RTE_LOG(INFO, CHANNEL_MANAGER, "Unable to initialize channel manager\n");
908 global_hypervisor_available = 1;
910 global_maplen = VIR_CPU_MAPLEN(CHANNEL_CMDS_MAX_CPUS);
912 global_vircpuinfo = rte_zmalloc(NULL,
913 sizeof(*global_vircpuinfo) *
914 CHANNEL_CMDS_MAX_CPUS, RTE_CACHE_LINE_SIZE);
915 if (global_vircpuinfo == NULL) {
916 RTE_LOG(ERR, CHANNEL_MANAGER, "Error allocating memory for CPU Info\n");
919 global_cpumaps = rte_zmalloc(NULL,
920 CHANNEL_CMDS_MAX_CPUS * global_maplen,
921 RTE_CACHE_LINE_SIZE);
922 if (global_cpumaps == NULL)
925 if (virNodeGetInfo(global_vir_conn_ptr, &info)) {
926 RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n");
929 global_n_host_cpus = (unsigned int)info.cpus;
934 if (global_n_host_cpus > CHANNEL_CMDS_MAX_CPUS) {
935 RTE_LOG(WARNING, CHANNEL_MANAGER, "The number of host CPUs(%u) exceeds the "
936 "maximum of %u. No cores over %u should be used.\n",
937 global_n_host_cpus, CHANNEL_CMDS_MAX_CPUS,
938 CHANNEL_CMDS_MAX_CPUS - 1);
939 global_n_host_cpus = CHANNEL_CMDS_MAX_CPUS;
944 if (global_hypervisor_available)
945 disconnect_hypervisor();
950 channel_manager_exit(void)
953 char mask[POWER_MGR_MAX_CPUS];
954 struct virtual_machine_info *vm_info;
956 LIST_FOREACH(vm_info, &vm_list_head, vms_info) {
958 rte_spinlock_lock(&(vm_info->config_spinlock));
960 memcpy(mask, (char *)vm_info->channel_mask, POWER_MGR_MAX_CPUS);
961 for (i = 0; i < POWER_MGR_MAX_CPUS; i++) {
964 remove_channel_from_monitor(
965 vm_info->channels[i]);
966 close(vm_info->channels[i]->fd);
967 rte_free(vm_info->channels[i]);
969 rte_spinlock_unlock(&(vm_info->config_spinlock));
971 LIST_REMOVE(vm_info, vms_info);
975 if (global_hypervisor_available) {
976 /* Only needed if hypervisor available */
977 rte_free(global_cpumaps);
978 rte_free(global_vircpuinfo);
979 disconnect_hypervisor();